Filament having unique tip and surface characteristics: United States Patent 9986820

By: Chan, John Geoffrey

A filament for use in a brush implement comprises an external material and at least a first internal material. The filament includes an elongated flexible body having a length, a longitudinal axis, and a longitudinal outer surface comprising the external material, the elongated body terminating with a tip having a tip surface comprising the external material, wherein the tip surface has therein a plurality of craters distributed throughout the tip surface in a predetermined pattern, each of the craters having a surface edge of a predetermined size and a predetermined shape, walls extending longitudinally from the surface edge and comprising the external material, and a bottom comprising the at least first internal material and situated at a depth from the surface edge, the surface edge being formed by the walls and the tip surface.

• Format: Paperback
• Language: English
• ISBN: B08QWZRNLV
• ISBN13: 9798583608010
• Release Date: January 1
• Publisher: Independently Published
• Length: 26 Pages
• Weight: 0.19 lbs.
• Dimensions: 0.1" x 8.5" x 11.0"